Electricity: measuring and testing – Particle precession resonance
Patent
1997-11-07
1999-11-16
Arana, Louis
Electricity: measuring and testing
Particle precession resonance
324318, G01V 300
Patent
active
059864532
ABSTRACT:
A method and apparatus which utilizes the hysteritic behavior of type II superconductors is provided for reducing the effective magnetic susceptibility of such high temperature superconducting materials being used close to the sample region in nuclear magnetic resonance system probes by providing decaying AC changes in the magnetic field parallel to said superconductive material. The method is particularly applicable to receiver coils. Reducing the effective magnetic susceptibility of superconducting receiver coils enables the improved sensitivity they inherently provide to be realized without loss of resolution resulting from line broadening caused by susceptibility discontinuities of materials near the sample region of the probe.
REFERENCES:
patent: 5508613 (1996-04-01), Kotsubo et al.
patent: 5689187 (1997-11-01), Marek et al.
Wither, et al., entitled "HTS Receiver Coils for Magnetic-Resonance Instruments", published in SPIE, Apr. 1994, vol. 2156, pp. 27-35.
Orlando and Delin, Addison Wesley Publishing Co., entitled "Foundations of Applied Superconductivity", 1990, Chap's 6 and 7, pp. 259-391.
Anderson Weston
Withers Richard S.
Arana Louis
Berkowitz Edward H.
Varian Inc.
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